Hi HEnRY,
All I can see is your image as an attachment of your ICMP requests.
As other members of the forum has stated, the CheckPoint 4 Beginners videos would be of help.
To help on this instance, we would require further information and screenshots of the below.
1) Topology Definition of the Gateway in SmartConsole
2) Screenshot of the NAT Policy
3) Screenshot of the rulebase.
I appreciate that the screenshots will have business specific information. So I am happy if you wish to contact me directly via e-mail to assist with the sharing of images.
Regards
Mark